Organic-inorganic hybrid material for hole transport in inverted perovskite solar cells

Yogesh S. Tingare, Chaochin Su, Ya Chun Hsu, Ning Wei Lai, Wan Chun Wang, Xiang Ching Lin, Penh Wen Lai, Hsuan Yu Yang, Xin Rui Lew, Wen Ren Li

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1 Scopus citations


Hole mobility is critical to the power conversion efficiencies of perovskite solar cells (PSCs). Organic small-molecule hole-transporting materials (HTMs) have attracted considerable interest in PSCs due to their structural flexibility and operational durability, but they suffer from modest hole mobility. On the other hand, inorganic HTMs with good hole mobility are inflexible in structural variation and exhibit unsatisfactory cell efficiency. In this study, a ligand BT28 and its zinc-based coordination complex BTZ30 were synthesized, characterized, and investigated as HTMs for PSC applications. The mixed-halide perovskites can be grown uniformly with large crystalline grains on both HTMs, which exhibit similar optical and electrochemical properties. However, it was discovered that the BTZ30-based solar cell exhibited an open-circuit voltage of 1.0817 V and a high short-circuit current density of 23.1392 mA cm−2 with a champion power conversion efficiency of close to 20 %. The performance difference between the two HTMs can be attributed to the difference in their hole mobilities, which is 63.31 % higher for BTZ30 than BT28. The comparison of non-metal and metal HTMs revealed the importance of considering hybrid structures to overcome some shortcomings associated with organic and inorganic HTMs and achieve high-performance PSCs.

Original languageEnglish
Article numbere202301508
Issue number10
StatePublished - 21 May 2024


  • Hole-mobility
  • Organic Hole-transporting Material
  • Perovskite Solar Cells
  • Short-circuit Current Density
  • Zn-metal Complex


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